title: Enlargement of the iliopsoas bursa: unusual cause of cystic mass on pelvic sonogram.
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000150:complications*; D003560:Cysts / Q000175:diagnosis / Q000209:etiology; D005260:Female; D006801:Humans; D006984:Hypertrophy; D009132:Muscles / Q000473:pathology*; D010388:Pelvis; D014463:Ultrasonography